Modded wii Burned Gamecube Games

Hi i have a modded wii bought it from a modder chinatown =P anyways I burned some gamecube games but when i put in the game it shows the gamecube icon the minut i press start i hear it load i can hear mario on the backround but no video and i can hear mario jumping when i press the buttons the game is super mario sunshine any1 know what the problem is? and yes normal wii games work fine